In a cutting wheel (103) for a tunnel boring machine, a tool condition monitoring device is provided to monitor the condition of at least one mining tool (112, 115, 118) during removal of a geological structure present, during tunneling, at the cutting wheel (103) in a tunneling direction. At least one support part (121, 124, 127) is installed separately and at a distance from the or a relevant mining tool (112, 115, 118). In the relevant support part (121, 124, 127), a current conductor element is embedded, which is interrupted in terms of its ability to carry current after a wear limit which is characteristic of the condition of the relevant mining tool (112, 115, 118) has been reached. In this way, the condition of mining tools (112, 115, 118) can be reliably determined during a relatively simple maintenance operation or retrofitting with a support part (121, 124, 127).

The present invention relates to a mechanical tunneling apparatus and process for a tunnel in a quicksand stratum. The mechanical tunneling apparatus comprises isolating apparatuses arranged at an upper end and a lower end of a supporting apparatus; an excavation apparatus arranged at a front end of the supporting apparatus; a spraying apparatus arranged on the isolating apparatuses and the excavation apparatus; a muck discharging apparatus arranged at a lower part of the supporting apparatus; and a propulsion apparatus arranged at a rear end of the supporting apparatus.

The present invention relates to a mechanical tunneling apparatus and process for a tunnel in a quicksand stratum. The mechanical tunneling apparatus comprises isolating apparatuses arranged at an upper end and a lower end of a supporting apparatus; an excavation apparatus arranged at a front end of the supporting apparatus; a spraying apparatus arranged on the isolating apparatuses and the excavation apparatus; a muck discharging apparatus arranged at a lower part of the supporting apparatus; and a propulsion apparatus arranged at a rear end of the supporting apparatus.

The invention relates to a tunnel boring device for creating a bore from a starting point to a target point in the ground, along a predefined boring line by advancing the tunnel boring device in order to create a tunnel or for laying a pipeline in the ground using a boring tool to break up the ground; having at least one feed line for supplying a boring fluid to the boring tool; having at least one section, arranged at the rear of the boring tool, for receiving the ground which has been broken up and is present in the form of cuttings, wherein the region of the boring tool and the at least one section are essentially filled with boring fluid, and the boring fluid is provided in the region of the boring tool and within the at least one section with a pressure that essentially corresponds to the pressure in the ground at the heading face; having at least one pump for removing, from the section, the boring fluid mixed with the cuttings; having at least one conveying line for removing, from the bore, the boring fluid mixed with cuttings, this line being connected to the delivery side of the at least one pump, and wherein the at least one pump is connected to the at least one section via at least one suction line. In that context, it is provided that the pump is a jet pump which is connected to a drive line via which a driving fluid is supplied to the jet pump; that the at least one pump is arranged outside the at least one section; and that the at least one suction line contains at least one shutoff valve with which the suction line can be shut off.

The present invention discloses a laser-assisted tunnel boring machine and a rock fragmenting method thereof, which belongs to the technical field of tunnel engineering. Two rock fragmenting modes exist: a laser-cutter rock fragmenting mode and a cutter rock fragmenting mode, wherein the two rock fragmenting modes are recognized and switched by an intelligent control system, the laser-cutter rock fragmenting mode is used in the hard rock stratum, so that the rock fragmenting efficiency can be improved, and the cutter rock fragmenting mode is used in the soft rock stratum; and for the laser-assisted rock fragmenting mode, hot fragmenting is mainly performed using lasers, and laser heads are installed on a cutter head of the tunnel boring machine and are assisted by water spray systems, to achieve the purposes of auxiliary rock fragmenting by laser radiation for hot cracking and water spray for quick cooling, and mechanical rock fragmenting for excavation. By reasonably selecting a rock fragmenting mode, the adaptability of the tunnel boring machine to the complicated geological conditions of alternatively distributed soft and hard rock is improved, so that not only the rock fragmenting efficiency is improved, but also construction costs are saved.

The present invention discloses a laser-assisted tunnel boring machine and a rock fragmenting method thereof, which belongs to the technical field of tunnel engineering. Two rock fragmenting modes exist: a laser-cutter rock fragmenting mode and a cutter rock fragmenting mode, wherein the two rock fragmenting modes are recognized and switched by an intelligent control system, the laser-cutter rock fragmenting mode is used in the hard rock stratum, so that the rock fragmenting efficiency can be improved, and the cutter rock fragmenting mode is used in the soft rock stratum; and for the laser-assisted rock fragmenting mode, hot fragmenting is mainly performed using lasers, and laser heads are installed on a cutter head of the tunnel boring machine and are assisted by water spray systems, to achieve the purposes of auxiliary rock fragmenting by laser radiation for hot cracking and water spray for quick cooling, and mechanical rock fragmenting for excavation. By reasonably selecting a rock fragmenting mode, the adaptability of the tunnel boring machine to the complicated geological conditions of alternatively distributed soft and hard rock is improved, so that not only the rock fragmenting efficiency is improved, but also construction costs are saved.

A guide of an excavation tool replacement device includes an inner guide member configured to guide advancing and retreating of an excavation tool, and an outer guide member configured to support the inner guide member such that the inner guide member is movable to a face side and an anti-face side. The inner guide member has, at a face side end thereof, a first sealing member configured to come into close contact with a gate plate from the anti-face side.

A guide of an excavation tool replacement device includes an inner guide member configured to guide advancing and retreating of an excavation tool, and an outer guide member configured to support the inner guide member such that the inner guide member is movable to a face side and an anti-face side. The inner guide member has, at a face side end thereof, a first sealing member configured to come into close contact with a gate plate from the anti-face side.

A tunnel boring apparatus includes a shield body and a cutting disc provided at a front portion of the shield body. The tunnel boring apparatus includes a high pressure liquid device, which includes a liquid storage tank for storing a predetermined amount of liquid, a pressure raising device for increasing a pressure of the liquid, and a plurality of nozzles. The pressing raising device is connected to the liquid storage tank, and to a central rotating head through a first guiding pipeline. The nozzles are provided on the cutting disc, and are connected to the central rotating head through a second guiding pipeline.

A tunnel boring apparatus includes a shield body and a cutting disc provided at a front portion of the shield body. The tunnel boring apparatus includes a high pressure liquid device, which includes a liquid storage tank for storing a predetermined amount of liquid, a pressure raising device for increasing a pressure of the liquid, and a plurality of nozzles. The pressing raising device is connected to the liquid storage tank, and to a central rotating head through a first guiding pipeline. The nozzles are provided on the cutting disc, and are connected to the central rotating head through a second guiding pipeline.